Color temperature and penetration of light Color headlights’ visible light generally refers to the radiation of 0.38~0.76 micron in the solar radiation spectrum. It is composed of 7 colors such as red, orange, yellow, green, cyan, blue and purple. Light Wavelength Different colors of light have different wavelengths, different wavelengths of light, the degree of scattering is not the same. The longer the wavelength, the less likely it is to be scattered, and the stronger its penetrating power, such as red, orange, yellow. Conversely, the longer the waveband, the easier it is to be scattered, and the weaker its penetrating power,such as blue and purple. Different wavelengths of light correspond to different color temperatures(as follows). It can be seen that color temperature is a decisive factor in determining the strength of light penetration. 7 Kinds of Visible light Light Colors Wavelength (nm) Frequency (Hz) Center wavelength (nm) Red 780-622 3.8